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Monitoring persiste...
Monitoring persistent organic pollutants (POPs) in sub-Arctic and Arctic marine mammals, 1984 - 2009
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- Rotander, Anna, 1978- (author)
- Örebro universitet,Akademin för naturvetenskap och teknik,Miljö och Hälsa vid MTM
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- van Bavel, Bert, Professor (thesis advisor)
- Örebro universitet,Akademin för naturvetenskap och teknik
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- Engwall, Magnus, Professor (thesis advisor)
- Örebro universitet,Akademin för naturvetenskap och teknik
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- de Boer, Jacob, Professor (opponent)
- VU University Amsterdam, Institute for Environmental Studies (IVM)
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(creator_code:org_t)
- ISBN 9789176688137
- Örebro : Örebro universitet, 2011
- English 77 s.
- Related links:
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https://oru.diva-por...
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Abstract
Subject headings
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- The Arctic has become an important indicator region for assessing persistence and bioaccumulation properties of persistent organic pollutants (POPs). This thesis is aimed at evaluating the occurrence of persistent halogenated POPs in seven species of sub-Arctic and Arctic marine mammals over a 25-year period. The emphasis is on studying temporal variations in concentration of three categories of POPs, including naturally occurring organobromine compounds. Polybrominated diphenyl ethers (PBDEs), Metoxylated diphenyl ethers (MeO-PBDEs), and polychlorinated naphtalenes (PCNs) were extracted from blubber tissue and analyzed by GC/MS. Polyfluoroalkyl substances (PFAS) were extracted from livers and analyzed by LC-MS/MS. Although restricted by the number of pooled samples, survey points, and species available from the specimen banks, the results showed some interesting contamination patterns. Overall, pollutant concentrations showed signs of declining or levelling out, indicating a decrease in POP exposure in the studied areas in recent years. However, increasing levels of long-chain fluorinated compounds (PFCAs) present in most species is a finding of concern, and implies that a continuous monitoring of these compounds is important. Interestingly, a shift over time in the relative abundance of PFOS isomers in ringed seals was observed, indicating a change in exposure to PFOS in recent years. In many of the investigated species the MeO-PBDE levels equalled or exceeded the levels of PBDEs, showing that MeO-PBDEs can be major contributors to the organobromine load in marine mammal species. No apparent relation was found between PBDE and MeO-PBDE levels, adding further support for a natural origin of MeO-PBDEs.
Subject headings
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Keyword
- Arctic
- marine mammals
- North Atlantic Ocean
- POPs
- temporal variations
- NATURAL SCIENCES
- NATURVETENSKAP
- Environmental chemistry
- Miljökemi
- Miljökemi
- Environmental Chemistry
Publication and Content Type
- vet (subject category)
- dok (subject category)
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